This introductory course to Windows 7 environment will teach you about working with the Windows operating system. You will learn about basic functions including start menu; the desktop; managing files, folders, and libraries.

Still I am not sure what you mean by doesn't work. If you want to assign a string this value:
"<body bgcolor='Gold' bgproperties='fixed' background='CID:|||c:\temp\logo.gif'>"
This is how i would do it:
string s = "<body bgcolor='Gold' bgproperties='fixed' background='CID:|||c:\temp\logo.gif'>";